Remove Retain Cycle Pragma from FBTask
Remove Retain Cycle Pragma from FBTask

Summary: We've now resolved this when switching over to mounting callbacks into the Completion Future. We can now remove this pragma.

Reviewed By: marekcirkos

Differential Revision: D6682601

fbshipit-source-id: 3684f49cf16d11cd4aa2e5b64fbf716aaf8d54a5

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl